Competing flow and collision effects in a monodispersed liquid–solid fluidized bed at a moderate Archimedes number

We study the effects of fluid–particle and particle–particle interactions in a three-dimensional monodispersed reactor with unstable fluidization. Simulations were conducted using immersed boundary method for particle Reynolds numbers 20–70 an Archimedes number 23 600. Two different flow regimes identified as function number. For low ( $20 < Re_p 40$ ), porosity is relatively dynamics are dominated by interparticle collisions that produce anisotropic velocity fluctuations. The relative importance hydrodynamic increases increasing number, leading to minimized anisotropy fluctuations at intermediate high $Re_p > effects, decreasing more A sharp increase occurs when from 40 50, corresponding transition regime which collision equally important (regime 1) hydrodynamic-dominated 2). results imply optimum roughly investigated 600 mixing expected peak, consistent studies showing peak performance similar Results also show maximum effective attained Future work required relate